ATC radar problem ASR-9 displays ground traffic.

Attributes
ACN	270935
Time
Date	199405
Day	Tue
Local Time Of Day	1801 To 2400
Place
Locale Reference	atc facility : sjt
State Reference	TX
Altitude	agl bound lower : 0 agl bound upper : 0
Environment
Flight Conditions	IMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : maf
Person 1
Affiliation	government : faa
Function	controller : approach
Qualification	controller : radar
Experience	controller military : 4 controller non radar : 3 controller radar : 3
ASRS Report	270935
Events
Anomaly	other anomaly other
Independent Detector	other controllera
Resolutory Action	none taken : unable
Consequence	faa : investigated
Supplementary
Primary Problem	Navigational Facility
Air Traffic Incident	other
Situations
Navigational Aid	Unspecified

Narrative:

I was working the san angelo approach position of midland approach control. I passed traffic information to atx X, an aerostar. The traffic was at X's 11 O'clock, 1/2 mi northbound, very slow moving, type and altitude unknown. After updating the traffic again the pilot of X idented the traffic as a truck on the highway. It is my understanding that the ASR-9 radar is not supposed to display ground targets. The maintenance people for the sjt radar have been working on this problem with no progress being made.

Original NASA ASRS Text

Title: ATC RADAR PROB ASR-9 DISPLAYS GND TFC.

Narrative: I WAS WORKING THE SAN ANGELO APCH POS OF MIDLAND APCH CTL. I PASSED TFC INFO TO ATX X, AN AEROSTAR. THE TFC WAS AT X'S 11 O'CLOCK, 1/2 MI NBOUND, VERY SLOW MOVING, TYPE AND ALT UNKNOWN. AFTER UPDATING THE TFC AGAIN THE PLT OF X IDENTED THE TFC AS A TRUCK ON THE HWY. IT IS MY UNDERSTANDING THAT THE ASR-9 RADAR IS NOT SUPPOSED TO DISPLAY GND TARGETS. THE MAINT PEOPLE FOR THE SJT RADAR HAVE BEEN WORKING ON THIS PROB WITH NO PROGRESS BEING MADE.

Data retrieved from NASA's ASRS site as of July 2007 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.